Question

fill in the blank question
the hormone that stimulates the pancreas to secrete an abundant amount of fluid rich in bicarbonate ions when acidic chyme enters the duodenum is
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Explanation:

When acidic chyme enters the duodenum, secretin is the hormone that stimulates the pancreas to secrete a fluid rich in bicarbonate ions. Secretin is released by the duodenal mucosa in response to the acidic environment. The bicarbonate - rich secretion from the pancreas helps neutralize the acidic chyme, creating a more favorable pH for the action of digestive enzymes in the small intestine.

Answer:

Secretin